Pha N. Pham
Department of Machinery and Control Systems, Shibaura Institute of Technology, Saitama, Japan
Kazuhisa Ito
Department of Machinery and Control Systems, Shibaura Institute of Technology, Saitama, Japan
Shigeru Ikeo
Department of Engineering and Applied Sciences, Sophia University, Tokyo, Japan
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http://dx.doi.org/10.3384/ecp1392a41Ingår i: 13th Scandinavian International Conference on Fluid Power; June 3-5; 2013; Linköping; Sweden
Linköping Electronic Conference Proceedings 92:41, s. 419-427
Publicerad: 2013-09-09
ISBN: 978-91-7519-572-8
ISSN: 1650-3686 (tryckt), 1650-3740 (online)
In recent years; water hydraulics has been getting more and more attention from the fluid power society because of its inherent merits; including environmental friendliness; high safety against fire hazards; running cost reduction; and easy availability. However; water hydraulics still has two main problems to make it popular in application; fist one is the much higher price of water hydraulic devices in comparison with the conventional one and the other is energy loss because of more leakage and larger friction than oil hydraulics due to its low viscosity. Water hydraulic systems without using servo valve such as a water hydraulic fluid switching transmission (FST) and a water hydraulic pump motor transmission (PMT) that can recover energy in deceleration period are good solutions for these difficulties.
This paper investigates two most important points on velocity response and energy saving performance consisting of recovery energy and energy consumption of water hydraulic FST and PMT. The comparison between the experimental results of these two transmissions also will be presented in this research to get the conclusion for the advantages and disadvantages of each transmission. The PMT system has proved its many advantages such as reducing noise because of smooth operation; lengthening the life duration of the devices; and the drastic reducing of both steady state error in a working phase and energy consumption. The recovered energies of the both systems are almost same and get the values from 26.3 to 31.7% of the kinetic energy of flywheel
Water hydraulic; fluid switching transmission; hydraulic pump motor transmission; velocity performance; energy saving; energy consumption
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